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A charging and discharging current limiting method for a battery energy storage system

A battery energy storage system, charge and discharge current technology, applied in the direction of electric energy storage systems, battery circuit devices, collectors, etc., can solve the problems of batteries that cannot meet the needs of energy storage, to prevent battery overcharge and overdischarge, battery charge and discharge Safe and reliable, prevent overcharge and overdischarge effect

Active Publication Date: 2016-06-29
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiency that the existing charging and discharging protection method cannot satisfy the energy storage battery used to cooperate with the system function, the present invention provides a method for limiting the charging and discharging current of the battery energy storage system of the energy storage bidirectional converter

Method used

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  • A charging and discharging current limiting method for a battery energy storage system
  • A charging and discharging current limiting method for a battery energy storage system
  • A charging and discharging current limiting method for a battery energy storage system

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 1 As shown, the dotted line box is the main principle part of the method of the present invention. First, the charging and discharging voltage value of the rechargeable battery in the current energy storage bidirectional converter battery energy storage system is obtained by sampling, and the voltage value is compared with the set rechargeable battery charging and discharging voltage value. The discharge voltage boundary value, that is, the highest charging and discharging voltage value of the rechargeable battery is compared with the lowest charging and discharging voltage value, and the obtained voltage error is PI controlled, and then the obtained current charging and discharging current value of the rechargeable battery is limited. The maximum charging current value or the maximum discharging current value of the recha...

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Abstract

A charging and discharging current limiting method of a battery energy storage system, the method compares the current charging battery voltage value with the battery charging and discharging boundary voltage value, that is, the highest charging and discharging voltage of the battery and the lowest charging and discharging voltage of the battery to obtain a voltage difference; Carry out proportional integral (PI) calculation, and use the charging and discharging current threshold of the rechargeable battery, that is, the maximum charging current of the battery or the maximum discharging current of the battery to limit the PI output to obtain the acceptable charging and discharging current value of the current battery, and then compare it with the current energy storage two-way transformer Compared with the charging and discharging current threshold of the battery energy storage system of the energy storage bidirectional converter, the charging and discharging current threshold of the new energy storage bidirectional converter battery energy storage system is obtained; The fixed value is limited to obtain a safe charge and discharge current value.

Description

technical field [0001] The invention relates to a charging and discharging current limiting method of a battery energy storage system. Background technique [0002] The development of renewable energy requires large-scale power storage, which is inseparable from energy storage batteries. At present, energy storage batteries mainly include lead-acid batteries, lithium batteries, and supercapacitors. When the energy storage battery is used as a separate energy storage device, it is mostly used in electric bicycles, electric motorcycles, electric vehicles, etc. scale energy storage. [0003] At present, the battery charge and discharge protection method generally sets a maximum charge protection voltage and a minimum discharge protection voltage, and realizes charge and discharge protection by detecting the difference between the voltage of the rechargeable battery and the protection voltage. [0004] Patent 200680021333.6 "Apparatus and Method for Controlling Charging / Disch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02J15/00
Inventor 李宁宁张国伟唐西胜齐智平薛驰赵连岐
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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